Global Patent Index - EP 2257849 A4

EP 2257849 A4 20111019 - CAPACITIVE COMB FEEDBACK FOR HIGH SPEED SCAN MIRROR

Title (en)

CAPACITIVE COMB FEEDBACK FOR HIGH SPEED SCAN MIRROR

Title (de)

KAPAZITATIVE KAMMRÜCKMELDUNG FÜR HOCHGESCHWINDIGKEITSABTASTSPIEGEL

Title (fr)

RETOUR DE PEIGNE CAPACITIF POUR UN MIROIR DE BALAYAGE À HAUTE VITESSE

Publication

EP 2257849 A4 20111019 (EN)

Application

EP 09724521 A 20090316

Priority

  • US 2009037260 W 20090316
  • US 5461908 A 20080325

Abstract (en)

[origin: WO2009120524A1] An image projection system (100) has a laser (102, 104, 106) providing at least one beam (103, 105, 107) to a scan mirror apparatus (130) for scanning the beam (103, 105, 107) in two orthogonal directions (404, 406). The scan mirror (130) includes an oscillating portion (204) disposed contiguous to a frame (202) and includes a reflective portion (218) capable of reflecting the beam (103, 105, 107). Circuitry is provided for measuring the capacitance between interdigitated teeth (212, 214) on the frame (202) and the oscillating portion (204).

IPC 8 full level

G02B 26/08 (2006.01); G02B 26/10 (2006.01); H02N 1/00 (2006.01); H04N 1/04 (2006.01)

CPC (source: EP US)

G02B 26/0841 (2013.01 - EP US); G02B 26/0858 (2013.01 - EP US); H02N 1/008 (2013.01 - EP US); H04N 1/1135 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 2009120524 A1 20091001; CN 101981487 A 20110223; EP 2257849 A1 20101208; EP 2257849 A4 20111019; EP 2257849 B1 20171115; KR 101180773 B1 20120907; KR 20110002041 A 20110106; US 2009245299 A1 20091001; US 7997742 B2 20110816

DOCDB simple family (application)

US 2009037260 W 20090316; CN 200980110429 A 20090316; EP 09724521 A 20090316; KR 20107023676 A 20090316; US 5461908 A 20080325